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Revenue from Contracts with Customers (Details)
student in Thousands, $ in Thousands
 1 Months Ended
Jun. 30, 2020
campus
May 31, 2020
campus
Sep. 30, 2020
USD ($)
Mar. 25, 2020
student
Sep. 30, 2019
USD ($)
Revenue from Contract with Customer [Abstract]          
Receivables, which includes Tuition and Notes Receivable     $ 53,144   $ 44,629
Deferred revenue     $ 40,694   42,886
Disaggregation of Revenue [Line Items]          
Number of online students | student       8  
Number of campuses, in-person labs resumed | campus 4 8      
Percentage of students not returned to campus     5.00%    
Percentage of students completing catch up labs     28.00%    
Deferred revenue     $ 40,694   $ 42,886
Students          
Revenue from Contract with Customer [Abstract]          
Deferred revenue     6,100    
Disaggregation of Revenue [Line Items]          
Deferred revenue     $ 6,100